Improvement in screw and screw-driver



To all whom t'tmay concern:

tltted (states Latent @inline ALLENr S. APGAR, OF NEW YORK, N. Y.,ASSIGNOR TO HIMSELF AND .ISAAC ARNOLD JR., OF HADDAM, MASSACHUSETTS.

Letters Patent No. 101,207, dated Mlrrch 29, 1870.

IMPROVEMENT IN SCREW AND SCREW-DRIVLER.

The Schedule referred to in'these Letters Patent and making part of thesame Be it known that I, ALLEX S. Ardan, ot' the city county, and Stateof New York, have invented certain new and useful Improvements in theManufacture of Wood or Metal Screws, for screwinginto wood or metal, andScre\\\-D rivers for holding audturning said screws` into the wood ormetal; and to enable others skilled in the artrtoniake and use the same,I will proceed to describe, referring to the drawings, in

which the saine letters indicate' like parts in each of 'the figures.

The nature of this invention consists in `forming en ar-ignlar slit inone side and near the base ofthe nick of a wood or metal screw,theobject of which is to firmly hold the screw-driver in the nick of thescrew, and in a straight liuc, or nearly so, therewith, so that a screwplaced upon the end of the driver, will be held, and may be inserted ata distance where it would be difficult to place a screw by hand.

In the accompanying drawings- Figures 1 and 2 are side views, oneshowing the driver inserted into the nick and slit ofthe screw.

a is the wood or metal screw.

b is the head ofthe screw.

c is the nick of the screw.

This screw as thus far described is constructed like those in common'use.

d is a slit cnt in the side of and near the base of the nick c.

e is a screwdriver. y y

f is the screw-driver handle, both made in the cornmon way, except thata side projection or hook formation, h, is made on one side and near theend there' of, so that, by. placing the bent portion h into the nick cof the screw, while the handle or driver is held at an angle of aboutforty-five degrees with the screw, by turning the driver from this pointinto a straight into the angle required for insertion into the nick,

it can b e easily and quickly removed therefrom.k Thus the screw may beheld steadily upon the end of the drivel', (see fig.'2,) and insertedinto a place which would be difficult to reach by hand.

It will be seen that when the driver isinserted into the nick and slitofthe screw thus constructed, it caunot be pulled or withdrawntherefrom, except when placed at about the vsame angle as when it wasinserted, or, in other words, it cannot be pulled therefrom iu astraight line with the screw, but can be easily and quickly removed andreplaced by bringing it at a propel' angle out of a straight line withthe screw, which it is believed cannot be accomplished by any othereonstructionof' the screw and driver heretofore known or used.

I believe I have thus shown the nature, construction, and advantage ofthis invention, so as to enable others skilled in the artA to make anduse the same therefrom.

What I claim, therefbre', and desire to secure by Letters Patent. is

1. A nick-slitted screw, c rl a, substantially as set forth. i

2. The driver e, as described, for the purpose of holding, inserting,and screwing it to its place, substantially-as set forth.

` ALLEN S. APGAR. [ns] Witnesses:

S. R. NARINE, O. D. ROBERTS.

